[ekohl] 15465: IoRegisterDeviceInterface: Create nested keys one-by-one.

IoRegisterDeviceInterface: Create nested keys one-by-one.
Modified: trunk/reactos/ntoskrnl/io/deviface.c
  _____

Modified: trunk/reactos/ntoskrnl/io/deviface.c
--- trunk/reactos/ntoskrnl/io/deviface.c	2005-05-21 17:49:58 UTC
(rev 15464)
+++ trunk/reactos/ntoskrnl/io/deviface.c	2005-05-21 19:00:42 UTC
(rev 15465)
@@ -573,11 +573,13 @@

PUNICODE_STRING InstancePath;
    UNICODE_STRING GuidString;
    UNICODE_STRING SubKeyName;
+   UNICODE_STRING InterfaceKeyName;
    UNICODE_STRING BaseKeyName;
    UCHAR PdoNameInfoBuffer[sizeof(OBJECT_NAME_INFORMATION) + (256 *
sizeof(WCHAR))];
    POBJECT_NAME_INFORMATION PdoNameInfo =
(POBJECT_NAME_INFORMATION)PdoNameInfoBuffer;
    UNICODE_STRING DeviceInstance =
RTL_CONSTANT_STRING(L"DeviceInstance");
    UNICODE_STRING SymbolicLink = RTL_CONSTANT_STRING(L"SymbolicLink");
+   HANDLE ClassKey;
    HANDLE InterfaceKey;
    HANDLE SubKey;
    ULONG StartIndex;
@@ -611,15 +613,11 @@
    }
    ASSERT(PdoNameInfo->Name.Length);

-   /* Create base key name for this interface:
HKLM\SYSTEM\CurrentControlSet\DeviceClasses{GUID}##?#ACPI#PNP0501#1#{G
UID} */
+   /* Create base key name for this interface:
HKLM\SYSTEM\CurrentControlSet\Control\DeviceClasses{GUID} */
    ASSERT(PhysicalDeviceObject->DeviceObjectExtension->DeviceNode);
    InstancePath =
&PhysicalDeviceObject->DeviceObjectExtension->DeviceNode->InstancePath;
    BaseKeyName.Length = wcslen(BaseKeyString) * sizeof(WCHAR);
    BaseKeyName.MaximumLength = BaseKeyName.Length
-      + GuidString.Length
-      + 5 * sizeof(WCHAR) /* 5  = size of ##?# */
-      + InstancePath->Length
-      + sizeof(WCHAR)     /* 1  = size of # */
       + GuidString.Length;
    BaseKeyName.Buffer = ExAllocatePool(
       NonPagedPool,
@@ -631,16 +629,6 @@
    }
    wcscpy(BaseKeyName.Buffer, BaseKeyString);
    RtlAppendUnicodeStringToString(&BaseKeyName, &GuidString);
-   RtlAppendUnicodeToString(&BaseKeyName, L"\##?#");
-   StartIndex = BaseKeyName.Length / sizeof(WCHAR);
-   RtlAppendUnicodeStringToString(&BaseKeyName, InstancePath);
-   for (i = 0; i < InstancePath->Length / sizeof(WCHAR); i++)
-   {
-      if (BaseKeyName.Buffer[StartIndex + i] == '\')
-         BaseKeyName.Buffer[StartIndex + i] = '#';
-   }
-   RtlAppendUnicodeToString(&BaseKeyName, L"#");
-   RtlAppendUnicodeStringToString(&BaseKeyName, &GuidString);

/* Create BaseKeyName key in registry */
    InitializeObjectAttributes(
@@ -651,6 +639,57 @@
       NULL); /* SecurityDescriptor */

Status = ZwCreateKey(
+      &ClassKey,
+      KEY_WRITE,
+      &ObjectAttributes,
+      0, /* TileIndex */
+      NULL, /* Class */
+      REG_OPTION_VOLATILE,
+      NULL); /* Disposition */
+
+   if (!NT_SUCCESS(Status))
+   {
+      DPRINT("ZwCreateKey() failed with status 0x%08lx\n", Status);
+      ExFreePool(BaseKeyName.Buffer);
+      return Status;
+   }
+
+   /* Create key name for this interface: ##?#ACPI#PNP0501#1#{GUID} */
+   InterfaceKeyName.Length = 0;
+   InterfaceKeyName.MaximumLength =
+      4 * sizeof(WCHAR) + /* 4  = size of ##?# */
+      InstancePath->Length +
+      sizeof(WCHAR) +     /* 1  = size of # */
+      GuidString.Length;
+   InterfaceKeyName.Buffer = ExAllocatePool(
+      NonPagedPool,
+      InterfaceKeyName.MaximumLength);
+   if (!InterfaceKeyName.Buffer)
+   {
+      DPRINT("ExAllocatePool() failed\n");
+      return STATUS_INSUFFICIENT_RESOURCES;
+   }
+
+   RtlAppendUnicodeToString(&InterfaceKeyName, L"##?#");
+   StartIndex = InterfaceKeyName.Length / sizeof(WCHAR);
+   RtlAppendUnicodeStringToString(&InterfaceKeyName, InstancePath);
+   for (i = 0; i < InstancePath->Length / sizeof(WCHAR); i++)
+   {
+      if (InterfaceKeyName.Buffer[StartIndex + i] == '\')
+         InterfaceKeyName.Buffer[StartIndex + i] = '#';
+   }
+   RtlAppendUnicodeToString(&InterfaceKeyName, L"#");
+   RtlAppendUnicodeStringToString(&InterfaceKeyName, &GuidString);
+
+   /* Create the interface key in registry */
+   InitializeObjectAttributes(
+      &ObjectAttributes,
+      &InterfaceKeyName,
+      OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE | OBJ_OPENIF,
+      ClassKey,
+      NULL); /* SecurityDescriptor */
+
+   Status = ZwCreateKey(
       &InterfaceKey,
       KEY_WRITE,
       &ObjectAttributes,
@@ -662,6 +701,7 @@
    if (!NT_SUCCESS(Status))
    {
       DPRINT("ZwCreateKey() failed with status 0x%08lx\n", Status);
+      ZwClose(ClassKey);
       ExFreePool(BaseKeyName.Buffer);
       return Status;
    }
@@ -678,6 +718,8 @@
    {
       DPRINT("ZwSetValueKey() failed with status 0x%08lx\n", Status);
       ZwClose(InterfaceKey);
+      ZwClose(ClassKey);
+      ExFreePool(InterfaceKeyName.Buffer);
       ExFreePool(BaseKeyName.Buffer);
       return Status;
    }
@@ -694,6 +736,8 @@
    {
       DPRINT("ExAllocatePool() failed\n");
       ZwClose(InterfaceKey);
+      ZwClose(ClassKey);
+      ExFreePool(InterfaceKeyName.Buffer);
       ExFreePool(BaseKeyName.Buffer);
       return STATUS_INSUFFICIENT_RESOURCES;
    }
@@ -722,6 +766,8 @@
    {
       DPRINT("ZwCreateKey() failed with status 0x%08lx\n", Status);
       ZwClose(InterfaceKey);
+      ZwClose(ClassKey);
+      ExFreePool(InterfaceKeyName.Buffer);
       ExFreePool(BaseKeyName.Buffer);
       return Status;
    }
@@ -742,8 +788,10 @@
    if (!SymbolicLinkName->Buffer)
    {
       DPRINT("ExAllocatePool() failed\n");
+      ZwClose(SubKey);
       ZwClose(InterfaceKey);
-      ZwClose(SubKey);
+      ZwClose(ClassKey);
+      ExFreePool(InterfaceKeyName.Buffer);
       ExFreePool(SubKeyName.Buffer);
       ExFreePool(BaseKeyName.Buffer);
       return STATUS_INSUFFICIENT_RESOURCES;
@@ -771,9 +819,11 @@
    if (!NT_SUCCESS(Status))
    {
       DPRINT("IoCreateSymbolicLink() failed with status 0x%08lx\n",
Status);
+      ZwClose(SubKey);
       ZwClose(InterfaceKey);
-      ZwClose(SubKey);
+      ZwClose(ClassKey);
       ExFreePool(SubKeyName.Buffer);
+      ExFreePool(InterfaceKeyName.Buffer);
       ExFreePool(BaseKeyName.Buffer);
       ExFreePool(SymbolicLinkName->Buffer);
       return Status;
@@ -793,9 +843,11 @@
       ExFreePool(SymbolicLinkName->Buffer);
    }

+   ZwClose(SubKey);
    ZwClose(InterfaceKey);
-   ZwClose(SubKey);
+   ZwClose(ClassKey);
    ExFreePool(SubKeyName.Buffer);
+   ExFreePool(InterfaceKeyName.Buffer);
    ExFreePool(BaseKeyName.Buffer);

return Status;